Re: [Qemu-devel] did the qemu can emulate the whole system with the processor that without support the "virtulization and kvm"?

[Li Zhijian <lizhijian@cn.fujitsu.com>]

On 12/21/18 19:40, tugouxp wrote:
> thank you.
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> i just want to confirm one thing,  that is whether the qemu can emulate a whole operation system just by analysis instructions by instructions manually  without the support of KVM.

IIUC，
"operation system" often means a software but QEMU usually emulates hardwares, including cpus, memory, NIC, etc.
Please know that QEMU born earlier than KVM, so QEMU can work well without KVM.

Thanks


> so from the answer you give to me, it is feasible, right?
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> thanks very much!
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> At 2018-12-21 17:01:02, "Alex Bennée" <alex.bennee@linaro.org> wrote:
>> tugouxp <13824125580@163.com> writes:
>>
>>> Hi alex:
>>>      now my host machine did not have the "/dev/kvm" nodes and no chance to make it exists.
>>> so i want to know whether the "/dev/kvm" is  mandatory  for qemu to emulate the whole system.
>>> so i can make the emulation without the support of kvm mechanism.
>> QEMU runs in two modes - full system emulation with TCG doesn't require
>> KVM although it is relatively slow. On systems where there guest
>> architecture is the same as the host architecture you can run with KMV
>> (or HAX/WHPX/HVF) accelerators at near native speeds.
>>
>> The reasons for not having a /dev/kvm can vary but you haven't said what
>> your host architecture is and what OS you are running so it's hard to
>> offer advice here.
>>
>> --
>> Alex Bennée
>
-- 
Best regards.
Li Zhijian (8528)